nexus.c revision 143867
138032Speter/*- 271345Sgshapiro * Copyright 1998 Massachusetts Institute of Technology 364562Sgshapiro * 438032Speter * Permission to use, copy, modify, and distribute this software and 538032Speter * its documentation for any purpose and without fee is hereby 638032Speter * granted, provided that both the above copyright notice and this 738032Speter * permission notice appear in all copies, that both the above 838032Speter * copyright notice and this permission notice appear in all 938032Speter * supporting documentation, and that the name of M.I.T. not be used 1038032Speter * in advertising or publicity pertaining to distribution of the 1138032Speter * software without specific, written prior permission. M.I.T. makes 1238032Speter * no representations about the suitability of this software for any 1338032Speter * purpose. It is provided "as is" without express or implied 1438032Speter * warranty. 1571345Sgshapiro * 1664562Sgshapiro * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 1738032Speter * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 1864562Sgshapiro * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 1938032Speter * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 2038032Speter * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2138032Speter * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2238032Speter * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 2338032Speter * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 2438032Speter * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 2538032Speter * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 2638032Speter * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2738032Speter * SUCH DAMAGE. 2838032Speter * 2938032Speter * $FreeBSD: head/sys/ia64/ia64/nexus.c 143867 2005-03-20 06:55:49Z njl $ 3038032Speter */ 3138032Speter 3238032Speter/* 3338032Speter * This code implements a `root nexus' for Intel Architecture 3438032Speter * machines. The function of the root nexus is to serve as an 3538032Speter * attachment point for both processors and buses, and to manage 3638032Speter * resources which are common to all of them. In particular, 3738032Speter * this code implements the core resource managers for interrupt 3838032Speter * requests, DMA requests (which rightfully should be a part of the 3964562Sgshapiro * ISA code but it's easier to do it here for now), I/O port addresses, 4038032Speter * and I/O memory address space. 4138032Speter */ 4238032Speter 4338032Speter#define __RMAN_RESOURCE_VISIBLE 4438032Speter 4538032Speter#include <sys/param.h> 4638032Speter#include <sys/systm.h> 4738032Speter#include <sys/bus.h> 4838032Speter#include <sys/kernel.h> 4938032Speter#include <sys/malloc.h> 5038032Speter#include <sys/module.h> 5138032Speter#include <machine/bus.h> 5238032Speter#include <sys/rman.h> 5338032Speter#include <sys/interrupt.h> 5438032Speter 5538032Speter#include <vm/vm.h> 5664562Sgshapiro#include <vm/pmap.h> 5738032Speter 5838032Speter#include <machine/intr.h> 5938032Speter#include <machine/nexusvar.h> 6038032Speter#include <machine/pmap.h> 6138032Speter#include <machine/resource.h> 6238032Speter#include <machine/sapicvar.h> 6338032Speter#include <machine/vmparam.h> 6438032Speter 6538032Speter#include <isa/isareg.h> 6638032Speter#include <sys/rtprio.h> 6764562Sgshapiro 6838032Speterstatic MALLOC_DEFINE(M_NEXUSDEV, "nexusdev", "Nexus device"); 6938032Speterstruct nexus_device { 7038032Speter struct resource_list nx_resources; 7138032Speter int nx_pcibus; 7238032Speter}; 7338032Speter 7438032Speter#define DEVTONX(dev) ((struct nexus_device *)device_get_ivars(dev)) 7538032Speter 7638032Speterstatic struct rman irq_rman, drq_rman, port_rman, mem_rman; 7738032Speter 7838032Speterstatic int nexus_probe(device_t); 7938032Speterstatic int nexus_attach(device_t); 8038032Speterstatic int nexus_print_resources(struct resource_list *rl, const char *name, int type, 8138032Speter const char *format); 8238032Speterstatic int nexus_print_all_resources(device_t dev); 8338032Speterstatic int nexus_print_child(device_t, device_t); 8438032Speterstatic device_t nexus_add_child(device_t bus, int order, const char *name, 8538032Speter int unit); 8638032Speterstatic struct resource *nexus_alloc_resource(device_t, device_t, int, int *, 8738032Speter u_long, u_long, u_long, u_int); 8838032Speterstatic int nexus_read_ivar(device_t, device_t, int, uintptr_t *); 8938032Speterstatic int nexus_write_ivar(device_t, device_t, int, uintptr_t); 9038032Speterstatic int nexus_activate_resource(device_t, device_t, int, int, 9138032Speter struct resource *); 9264562Sgshapirostatic int nexus_deactivate_resource(device_t, device_t, int, int, 9338032Speter struct resource *); 9438032Speterstatic int nexus_release_resource(device_t, device_t, int, int, 9538032Speter struct resource *); 9638032Speterstatic int nexus_setup_intr(device_t, device_t, struct resource *, int flags, 9764562Sgshapiro void (*)(void *), void *, void **); 9838032Speterstatic int nexus_teardown_intr(device_t, device_t, struct resource *, 9938032Speter void *); 10038032Speterstatic struct resource_list *nexus_get_reslist(device_t dev, device_t child); 10164562Sgshapirostatic int nexus_set_resource(device_t, device_t, int, int, u_long, u_long); 10238032Speterstatic int nexus_get_resource(device_t, device_t, int, int, u_long *, 10338032Speter u_long *); 10438032Speterstatic void nexus_delete_resource(device_t, device_t, int, int); 10538032Speterstatic int nexus_config_intr(device_t, int, enum intr_trigger, 10638032Speter enum intr_polarity); 10738032Speter 10838032Speterstatic device_method_t nexus_methods[] = { 10964562Sgshapiro /* Device interface */ 11038032Speter DEVMETHOD(device_probe, nexus_probe), 11138032Speter DEVMETHOD(device_attach, nexus_attach), 11238032Speter DEVMETHOD(device_detach, bus_generic_detach), 11338032Speter DEVMETHOD(device_shutdown, bus_generic_shutdown), 11438032Speter DEVMETHOD(device_suspend, bus_generic_suspend), 11538032Speter DEVMETHOD(device_resume, bus_generic_resume), 11638032Speter 11738032Speter /* Bus interface */ 11838032Speter DEVMETHOD(bus_print_child, nexus_print_child), 11938032Speter DEVMETHOD(bus_add_child, nexus_add_child), 12038032Speter DEVMETHOD(bus_read_ivar, nexus_read_ivar), 12138032Speter DEVMETHOD(bus_write_ivar, nexus_write_ivar), 12238032Speter DEVMETHOD(bus_alloc_resource, nexus_alloc_resource), 12338032Speter DEVMETHOD(bus_release_resource, nexus_release_resource), 12464562Sgshapiro DEVMETHOD(bus_activate_resource, nexus_activate_resource), 12538032Speter DEVMETHOD(bus_deactivate_resource, nexus_deactivate_resource), 12638032Speter DEVMETHOD(bus_setup_intr, nexus_setup_intr), 12738032Speter DEVMETHOD(bus_teardown_intr, nexus_teardown_intr), 12838032Speter DEVMETHOD(bus_get_resource_list, nexus_get_reslist), 12938032Speter DEVMETHOD(bus_set_resource, nexus_set_resource), 13038032Speter DEVMETHOD(bus_get_resource, nexus_get_resource), 13138032Speter DEVMETHOD(bus_delete_resource, nexus_delete_resource), 13238032Speter DEVMETHOD(bus_config_intr, nexus_config_intr), 13338032Speter 13438032Speter { 0, 0 } 13538032Speter}; 13638032Speter 13738032Speterstatic driver_t nexus_driver = { 13838032Speter "nexus", 13938032Speter nexus_methods, 14038032Speter 1, /* no softc */ 14138032Speter}; 14238032Speterstatic devclass_t nexus_devclass; 14338032Speter 14438032SpeterDRIVER_MODULE(nexus, root, nexus_driver, nexus_devclass, 0, 0); 14538032Speter 14638032Speterstatic int 14738032Speternexus_probe(device_t dev) 14838032Speter{ 14938032Speter 15038032Speter device_quiet(dev); /* suppress attach message for neatness */ 15138032Speter 15238032Speter /* 15338032Speter * XXX working notes: 15464562Sgshapiro * 15564562Sgshapiro * - IRQ resource creation should be moved to the PIC/APIC driver. 15664562Sgshapiro * - DRQ resource creation should be moved to the DMAC driver. 15764562Sgshapiro * - The above should be sorted to probe earlier than any child busses. 15838032Speter * 15938032Speter * - Leave I/O and memory creation here, as child probes may need them. 16038032Speter * (especially eg. ACPI) 16138032Speter */ 16264562Sgshapiro 16364562Sgshapiro /* 16464562Sgshapiro * IRQ's are on the mainboard on old systems, but on the ISA part 16538032Speter * of PCI->ISA bridges. There would be multiple sets of IRQs on 16664562Sgshapiro * multi-ISA-bus systems. PCI interrupts are routed to the ISA 16738032Speter * component, so in a way, PCI can be a partial child of an ISA bus(!). 16864562Sgshapiro * APIC interrupts are global though. 16964562Sgshapiro * 17064562Sgshapiro * XXX We depend on the AT PIC driver correctly claiming IRQ 2 17164562Sgshapiro * to prevent its reuse elsewhere in the !APIC_IO case. 17264562Sgshapiro */ 17364562Sgshapiro irq_rman.rm_start = 0; 17438032Speter irq_rman.rm_type = RMAN_ARRAY; 17564562Sgshapiro irq_rman.rm_descr = "Interrupt request lines"; 17664562Sgshapiro irq_rman.rm_end = 255; 17764562Sgshapiro if (rman_init(&irq_rman) 17864562Sgshapiro || rman_manage_region(&irq_rman, 17964562Sgshapiro irq_rman.rm_start, irq_rman.rm_end)) 18064562Sgshapiro panic("nexus_probe irq_rman"); 18164562Sgshapiro 18264562Sgshapiro /* 18338032Speter * ISA DMA on PCI systems is implemented in the ISA part of each 18438032Speter * PCI->ISA bridge and the channels can be duplicated if there are 18538032Speter * multiple bridges. (eg: laptops with docking stations) 18638032Speter */ 18738032Speter drq_rman.rm_start = 0; 18838032Speter drq_rman.rm_end = 7; 18938032Speter drq_rman.rm_type = RMAN_ARRAY; 19038032Speter drq_rman.rm_descr = "DMA request lines"; 19138032Speter /* XXX drq 0 not available on some machines */ 19238032Speter if (rman_init(&drq_rman) 19338032Speter || rman_manage_region(&drq_rman, 19464562Sgshapiro drq_rman.rm_start, drq_rman.rm_end)) 19564562Sgshapiro panic("nexus_probe drq_rman"); 19664562Sgshapiro 19738032Speter /* 19838032Speter * However, IO ports and Memory truely are global at this level, 19964562Sgshapiro * as are APIC interrupts (however many IO APICS there turn out 20038032Speter * to be on large systems..) 20138032Speter */ 20238032Speter port_rman.rm_start = 0; 20338032Speter port_rman.rm_end = 0xffff; 20438032Speter port_rman.rm_type = RMAN_ARRAY; 20538032Speter port_rman.rm_descr = "I/O ports"; 20638032Speter if (rman_init(&port_rman) 20764562Sgshapiro || rman_manage_region(&port_rman, 0, 0xffff)) 20864562Sgshapiro panic("nexus_probe port_rman"); 20964562Sgshapiro 21064562Sgshapiro mem_rman.rm_start = 0; 21164562Sgshapiro mem_rman.rm_end = ~0u; 21238032Speter mem_rman.rm_type = RMAN_ARRAY; 21338032Speter mem_rman.rm_descr = "I/O memory addresses"; 21438032Speter if (rman_init(&mem_rman) 21538032Speter || rman_manage_region(&mem_rman, 0, ~0)) 21638032Speter panic("nexus_probe mem_rman"); 21738032Speter 21838032Speter return bus_generic_probe(dev); 21938032Speter} 22038032Speter 22138032Speterstatic int 22238032Speternexus_attach(device_t dev) 22338032Speter{ 22438032Speter /* 22538032Speter * Mask the legacy PICs - we will use the I/O SAPIC for interrupt. 22638032Speter */ 22738032Speter outb(IO_ICU1+1, 0xff); 22838032Speter outb(IO_ICU2+1, 0xff); 22938032Speter 23038032Speter bus_generic_attach(dev); 23138032Speter return 0; 23238032Speter} 23338032Speter 23438032Speterstatic int 23538032Speternexus_print_resources(struct resource_list *rl, const char *name, int type, 23638032Speter const char *format) 23738032Speter{ 23864562Sgshapiro struct resource_list_entry *rle; 23938032Speter int printed, retval; 24038032Speter 24138032Speter printed = 0; 24238032Speter retval = 0; 24338032Speter /* Yes, this is kinda cheating */ 24464562Sgshapiro STAILQ_FOREACH(rle, rl, link) { 24564562Sgshapiro if (rle->type == type) { 24664562Sgshapiro if (printed == 0) 24764562Sgshapiro retval += printf(" %s ", name); 24864562Sgshapiro else if (printed > 0) 24964562Sgshapiro retval += printf(","); 25064562Sgshapiro printed++; 25164562Sgshapiro retval += printf(format, rle->start); 25264562Sgshapiro if (rle->count > 1) { 25364562Sgshapiro retval += printf("-"); 25464562Sgshapiro retval += printf(format, rle->start + 25564562Sgshapiro rle->count - 1); 25664562Sgshapiro } 25764562Sgshapiro } 25864562Sgshapiro } 25964562Sgshapiro return retval; 26064562Sgshapiro} 26164562Sgshapiro 26264562Sgshapirostatic int 26364562Sgshapironexus_print_all_resources(device_t dev) 26464562Sgshapiro{ 26564562Sgshapiro struct nexus_device *ndev = DEVTONX(dev); 26664562Sgshapiro struct resource_list *rl = &ndev->nx_resources; 26764562Sgshapiro int retval = 0; 26864562Sgshapiro 26964562Sgshapiro if (STAILQ_FIRST(rl) || ndev->nx_pcibus != -1) 27064562Sgshapiro retval += printf(" at"); 27171345Sgshapiro 27264562Sgshapiro retval += nexus_print_resources(rl, "port", SYS_RES_IOPORT, "%#lx"); 27364562Sgshapiro retval += nexus_print_resources(rl, "iomem", SYS_RES_MEMORY, "%#lx"); 27464562Sgshapiro retval += nexus_print_resources(rl, "irq", SYS_RES_IRQ, "%ld"); 27564562Sgshapiro 27664562Sgshapiro return retval; 27764562Sgshapiro} 27864562Sgshapiro 27964562Sgshapirostatic int 28071345Sgshapironexus_print_child(device_t bus, device_t child) 28164562Sgshapiro{ 28264562Sgshapiro struct nexus_device *ndev = DEVTONX(child); 28364562Sgshapiro int retval = 0; 28464562Sgshapiro 28564562Sgshapiro retval += bus_print_child_header(bus, child); 28664562Sgshapiro retval += nexus_print_all_resources(child); 28764562Sgshapiro if (ndev->nx_pcibus != -1) 28864562Sgshapiro retval += printf(" pcibus %d", ndev->nx_pcibus); 28964562Sgshapiro if (device_get_flags(child)) 29064562Sgshapiro retval += printf(" flags %#x", device_get_flags(child)); 29164562Sgshapiro retval += printf(" on motherboard\n"); /* XXX "motherboard", ick */ 29264562Sgshapiro 29364562Sgshapiro return (retval); 29464562Sgshapiro} 29564562Sgshapiro 29664562Sgshapirostatic device_t 29764562Sgshapironexus_add_child(device_t bus, int order, const char *name, int unit) 29864562Sgshapiro{ 29964562Sgshapiro device_t child; 30064562Sgshapiro struct nexus_device *ndev; 30164562Sgshapiro 30264562Sgshapiro ndev = malloc(sizeof(struct nexus_device), M_NEXUSDEV, M_NOWAIT|M_ZERO); 30364562Sgshapiro if (!ndev) 30464562Sgshapiro return(0); 30564562Sgshapiro resource_list_init(&ndev->nx_resources); 30664562Sgshapiro ndev->nx_pcibus = -1; 30764562Sgshapiro 30864562Sgshapiro child = device_add_child_ordered(bus, order, name, unit); 30964562Sgshapiro 31064562Sgshapiro /* should we free this in nexus_child_detached? */ 31164562Sgshapiro device_set_ivars(child, ndev); 31264562Sgshapiro 31364562Sgshapiro return(child); 31464562Sgshapiro} 31564562Sgshapiro 31664562Sgshapirostatic int 31764562Sgshapironexus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 31864562Sgshapiro{ 31964562Sgshapiro struct nexus_device *ndev = DEVTONX(child); 32064562Sgshapiro 32164562Sgshapiro switch (which) { 32264562Sgshapiro case NEXUS_IVAR_PCIBUS: 32364562Sgshapiro *result = ndev->nx_pcibus; 32464562Sgshapiro break; 32564562Sgshapiro default: 32664562Sgshapiro return ENOENT; 32764562Sgshapiro } 32864562Sgshapiro return 0; 32964562Sgshapiro} 33071345Sgshapiro 33171345Sgshapiro 33264562Sgshapirostatic int 33364562Sgshapironexus_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 33464562Sgshapiro{ 33564562Sgshapiro struct nexus_device *ndev = DEVTONX(child); 33664562Sgshapiro 33771345Sgshapiro switch (which) { 33864562Sgshapiro case NEXUS_IVAR_PCIBUS: 33964562Sgshapiro ndev->nx_pcibus = value; 34064562Sgshapiro break; 34164562Sgshapiro default: 342 return ENOENT; 343 } 344 return 0; 345} 346 347 348/* 349 * Allocate a resource on behalf of child. NB: child is usually going to be a 350 * child of one of our descendants, not a direct child of nexus0. 351 * (Exceptions include npx.) 352 */ 353static struct resource * 354nexus_alloc_resource(device_t bus, device_t child, int type, int *rid, 355 u_long start, u_long end, u_long count, u_int flags) 356{ 357 struct nexus_device *ndev = DEVTONX(child); 358 struct resource *rv; 359 struct resource_list_entry *rle; 360 struct rman *rm; 361 int needactivate = flags & RF_ACTIVE; 362 363 /* 364 * If this is an allocation of the "default" range for a given RID, and 365 * we know what the resources for this device are (ie. they aren't maintained 366 * by a child bus), then work out the start/end values. 367 */ 368 if ((start == 0UL) && (end == ~0UL) && (count == 1)) { 369 if (ndev == NULL) 370 return(NULL); 371 rle = resource_list_find(&ndev->nx_resources, type, *rid); 372 if (rle == NULL) 373 return(NULL); 374 start = rle->start; 375 end = rle->end; 376 count = rle->count; 377 } 378 379 flags &= ~RF_ACTIVE; 380 381 switch (type) { 382 case SYS_RES_IRQ: 383 rm = &irq_rman; 384 break; 385 386 case SYS_RES_DRQ: 387 rm = &drq_rman; 388 break; 389 390 case SYS_RES_IOPORT: 391 rm = &port_rman; 392 break; 393 394 case SYS_RES_MEMORY: 395 rm = &mem_rman; 396 break; 397 398 default: 399 return 0; 400 } 401 402 rv = rman_reserve_resource(rm, start, end, count, flags, child); 403 if (rv == 0) 404 return 0; 405 406 if (type == SYS_RES_MEMORY) { 407 rman_set_bustag(rv, IA64_BUS_SPACE_MEM); 408 } else if (type == SYS_RES_IOPORT) { 409 rman_set_bustag(rv, IA64_BUS_SPACE_IO); 410 /* IBM-PC: the type of bus_space_handle_t is u_int */ 411 rman_set_bushandle(rv, rv->r_start); 412 } 413 414 if (needactivate) { 415 if (bus_activate_resource(child, type, *rid, rv)) { 416 rman_release_resource(rv); 417 return 0; 418 } 419 } 420 421 return rv; 422} 423 424static int 425nexus_activate_resource(device_t bus, device_t child, int type, int rid, 426 struct resource *r) 427{ 428 /* 429 * If this is a memory resource, map it into the kernel. 430 */ 431 if (rman_get_bustag(r) == IA64_BUS_SPACE_MEM) { 432 vm_offset_t paddr = rman_get_start(r); 433 vm_offset_t psize = rman_get_size(r); 434 caddr_t vaddr = 0; 435 436 vaddr = pmap_mapdev(paddr, psize); 437 rman_set_virtual(r, vaddr); 438 rman_set_bushandle(r, (bus_space_handle_t) paddr); 439 } 440 return (rman_activate_resource(r)); 441} 442 443static int 444nexus_deactivate_resource(device_t bus, device_t child, int type, int rid, 445 struct resource *r) 446{ 447 448 return (rman_deactivate_resource(r)); 449} 450 451static int 452nexus_release_resource(device_t bus, device_t child, int type, int rid, 453 struct resource *r) 454{ 455 if (rman_get_flags(r) & RF_ACTIVE) { 456 int error = bus_deactivate_resource(child, type, rid, r); 457 if (error) 458 return error; 459 } 460 return (rman_release_resource(r)); 461} 462 463/* 464 * Currently this uses the really grody interface from kern/kern_intr.c 465 * (which really doesn't belong in kern/anything.c). Eventually, all of 466 * the code in kern_intr.c and machdep_intr.c should get moved here, since 467 * this is going to be the official interface. 468 */ 469static int 470nexus_setup_intr(device_t bus, device_t child, struct resource *irq, 471 int flags, void (*ihand)(void *), void *arg, void **cookiep) 472{ 473 driver_t *driver; 474 int error; 475 476 /* somebody tried to setup an irq that failed to allocate! */ 477 if (irq == NULL) 478 panic("nexus_setup_intr: NULL irq resource!"); 479 480 *cookiep = 0; 481 if ((irq->r_flags & RF_SHAREABLE) == 0) 482 flags |= INTR_EXCL; 483 484 driver = device_get_driver(child); 485 486 /* 487 * We depend here on rman_activate_resource() being idempotent. 488 */ 489 error = rman_activate_resource(irq); 490 if (error) 491 return (error); 492 493 error = ia64_setup_intr(device_get_nameunit(child), irq->r_start, 494 ihand, arg, flags, cookiep, 0); 495 496 return (error); 497} 498 499static int 500nexus_teardown_intr(device_t dev, device_t child, struct resource *r, void *ih) 501{ 502#if 0 503 return (inthand_remove(ih)); 504#else 505 return 0; 506#endif 507} 508 509static struct resource_list * 510nexus_get_reslist(device_t dev, device_t child) 511{ 512 struct nexus_device *ndev = DEVTONX(child); 513 514 return (&ndev->nx_resources); 515} 516 517static int 518nexus_set_resource(device_t dev, device_t child, int type, int rid, u_long start, u_long count) 519{ 520 struct nexus_device *ndev = DEVTONX(child); 521 struct resource_list *rl = &ndev->nx_resources; 522 523 /* XXX this should return a success/failure indicator */ 524 resource_list_add(rl, type, rid, start, start + count - 1, count); 525 return(0); 526} 527 528static int 529nexus_get_resource(device_t dev, device_t child, int type, int rid, u_long *startp, u_long *countp) 530{ 531 struct nexus_device *ndev = DEVTONX(child); 532 struct resource_list *rl = &ndev->nx_resources; 533 struct resource_list_entry *rle; 534 535 rle = resource_list_find(rl, type, rid); 536 device_printf(child, "type %d rid %d startp %p countp %p - got %p\n", 537 type, rid, startp, countp, rle); 538 if (!rle) 539 return(ENOENT); 540 if (startp) 541 *startp = rle->start; 542 if (countp) 543 *countp = rle->count; 544 return(0); 545} 546 547static void 548nexus_delete_resource(device_t dev, device_t child, int type, int rid) 549{ 550 struct nexus_device *ndev = DEVTONX(child); 551 struct resource_list *rl = &ndev->nx_resources; 552 553 resource_list_delete(rl, type, rid); 554} 555 556static int 557nexus_config_intr(device_t dev, int irq, enum intr_trigger trig, 558 enum intr_polarity pol) 559{ 560 561 return (sapic_config_intr(irq, trig, pol)); 562} 563 564#if 0 565 566/* 567 * Placeholder which claims PnP 'devices' which describe system 568 * resources. 569 */ 570static struct isa_pnp_id sysresource_ids[] = { 571 { 0x010cd041 /* PNP0c01 */, "System Memory" }, 572 { 0x020cd041 /* PNP0c02 */, "System Resource" }, 573 { 0 } 574}; 575 576static int 577sysresource_probe(device_t dev) 578{ 579 int result; 580 581 if ((result = ISA_PNP_PROBE(device_get_parent(dev), dev, sysresource_ids)) <= 0) { 582 device_quiet(dev); 583 } 584 return(result); 585} 586 587static int 588sysresource_attach(device_t dev) 589{ 590 return(0); 591} 592 593static device_method_t sysresource_methods[] = { 594 /* Device interface */ 595 DEVMETHOD(device_probe, sysresource_probe), 596 DEVMETHOD(device_attach, sysresource_attach), 597 DEVMETHOD(device_detach, bus_generic_detach), 598 DEVMETHOD(device_shutdown, bus_generic_shutdown), 599 DEVMETHOD(device_suspend, bus_generic_suspend), 600 DEVMETHOD(device_resume, bus_generic_resume), 601 { 0, 0 } 602}; 603 604static driver_t sysresource_driver = { 605 "sysresource", 606 sysresource_methods, 607 1, /* no softc */ 608}; 609 610static devclass_t sysresource_devclass; 611 612DRIVER_MODULE(sysresource, isa, sysresource_driver, sysresource_devclass, 0, 0); 613 614#endif 615